Phone layout: opaque status bar and one safe-area rule for every edge

Each fix to the home-screen app's layout on iOS broke something else, and they
all traced back to black-translucent: it runs the page under the clock, so any
top-anchored control without its own inset sat behind it (the play view's back
button), and since iOS 26 it sizes the app one status bar short with a strip at
the bottom that CSS cannot paint (WebKit 301108). The status bar is opaque now
("black"), the page starts below it, and lib/fullHeight.ts - the JS workaround
for the short viewport - is gone with the CSS that depended on it.

viewport-fit=cover stays, so everything against a screen edge now adds that
edge's inset from shared --safe-* variables: the corner back button, the
remote-assign button, the assign toast, the tool buttons and the tab rail did
not before. The rules are written down under "Layout on phones" in the README.

On a phone held sideways the mini player and the tabs share one row instead of
taking half the screen.

Home-screen installs read the status-bar tag once: remove and re-add the app.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/README.md

@@ -159,6 +159,37 @@ Nunito is self-hosted in `public/fonts/` (one variable file per subset, ~74 kB)
 than pulled from Google. The mouse may have no internet, and a cached shell rendering in
 a fallback face looks broken.
 
+## Layout on phones
+
+Phones (`usePhoneLayout`: narrow, or short landscape on touch) get the touch layout in
+`components/mobile/`; tablets and the kiosk keep the keyboard one. The home-screen app
+on iOS has caught every shortcut taken here, so these are the rules - follow them rather
+than patching one element at a time:
+
+- **The status bar is opaque** (`apple-mobile-web-app-status-bar-style: black`). The page
+  starts below it, so nothing can end up under the clock. `black-translucent` looks
+  nicer, but it ran the page behind the status bar, and since iOS 26 it also sizes the
+  app one status bar short, leaving a strip at the bottom that CSS cannot paint
+  ([WebKit 301108](https://bugs.webkit.org/show_bug.cgi?id=301108)). The workarounds for
+  that (`100lvh`, measuring `screen` in JS) each broke something else. Installed apps
+  read this tag once: after changing it, remove the app and add it again.
+- **`viewport-fit=cover` stays**, so the sea fills the rounded corners and the home
+  indicator area, which means:
+- **Anything placed against a screen edge adds that edge's inset**: `--safe-top`,
+  `--safe-right`, `--safe-bottom` and `--safe-left` in `app.css`, always the variables
+  and never a bare `env()`. That covers `top`/`bottom`/`left`/`right` offsets of
+  positioned elements, and the padding of bars and scroll containers that reach the
+  edge. Scrolling content clears what floats over it (`--m-dock-clearance`). The top
+  inset is 0 with the opaque status bar, but stays in the formulas for Safari tabs and
+  landscape.
+- **The stage is pinned, not sized**: `position: fixed; inset: 0` on phones, with the sea
+  colour on `html`/`body` so any gap would show sea, not white. No viewport-height unit
+  is trusted in the home-screen app.
+- **The keyboard is measured, not assumed**: iOS slides it over the page without resizing
+  anything, so the dock is raised by `visualViewport` (`useKeyboardInset`) and drops its
+  home-indicator padding while the keyboard is up
+  ([safe-area-inset-bottom does not update for the keyboard](https://webventures.rejh.nl/blog/2025/safe-area-inset-bottom-does-not-update/)).
+
 ## Not implemented
 
 The mockup's second page, "Mein Zimmer" (Hue lights, a roller shutter and scenes), is

web/index.html

@@ -2,7 +2,8 @@
 <html lang="de">
   <head>
     <meta charset="utf-8" />
-    <!-- viewport-fit=cover so the sea reaches under the iPhone's rounded corners;
+    <!-- viewport-fit=cover so the sea reaches under the rounded corners and the home
+         indicator - edge-anchored elements clear them with the --safe-* insets;
          user-scalable=no because a pinch-zoom on a big pink play button is a misfire. -->
     <meta
       name="viewport"
@@ -18,8 +19,13 @@
     <meta name="apple-mobile-web-app-capable" content="yes" />
     <meta name="mobile-web-app-capable" content="yes" />
     <meta name="apple-mobile-web-app-title" content="Musik" />
-    <!-- black-translucent lets the page's own gradient run behind the status bar. -->
-    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
+    <!-- An opaque status bar, so the page starts below it - not black-translucent. That
+         one ran the page under the clock, which put every top-anchored control behind
+         it unless each remembered its inset, and since iOS 26 it also sizes the app one
+         status bar short with an unpaintable strip at the bottom (WebKit bug 301108).
+         See "Layout on phones" in README.md. Home-screen installs read this tag once:
+         remove and re-add the app after changing it. -->
+    <meta name="apple-mobile-web-app-status-bar-style" content="black" />
     <link rel="apple-touch-icon" href="/apple-touch-icon.png" />
     <link rel="icon" href="/icon-192.png" type="image/png" />
     <link rel="stylesheet" href="/fonts/nunito.css" />

web/src/App.tsx

@@ -643,7 +643,7 @@ export function App() {
         <div
           style={{
             position: "absolute",
-            bottom: 24,
+            bottom: "calc(24px + var(--safe-bottom))",
             left: "50%",
             transform: "translateX(-50%)",
             zIndex: 7,
@@ -762,7 +762,16 @@ export function App() {
           that corner, and parent mode is a tab in it instead. The F1 sheet's button is
           not on the typing page either (TippenApp has its own help and owns every key). */}
       {!phone && (
-        <div style={{ position: "absolute", left: 8, bottom: 8, zIndex: 5, display: "flex", gap: 8 }}>
+        <div
+          style={{
+            position: "absolute",
+            left: "calc(8px + var(--safe-left))",
+            bottom: "calc(8px + var(--safe-bottom))",
+            zIndex: 5,
+            display: "flex",
+            gap: 8,
+          }}
+        >
           {PERF_ENABLED && !perfOpen && (
             <ToolButton label="Leistungseinstellungen" onClick={() => setPerfOpen(true)}>
               ⚡
@@ -844,8 +853,8 @@ function CornerButton({
       title={label}
       style={{
         position: "absolute",
-        top: 18,
-        [side]: 24,
+        top: "calc(18px + var(--safe-top))",
+        [side]: `calc(24px + var(--safe-${side}))`,
         zIndex: 3,
         width: 44,
         height: 44,

web/src/components/AlbumModal.tsx

@@ -54,7 +54,7 @@ export function AlbumModal({
       style={{
         zIndex: 4,
         background: "oklch(15% 0.03 var(--hue) / .6)",
-        ...(phone && { alignItems: "flex-end", padding: "calc(40px + env(safe-area-inset-top)) 0 0" }),
+        ...(phone && { alignItems: "flex-end", padding: "calc(40px + var(--safe-top)) 0 0" }),
       }}
       onClick={onClose}
     >
@@ -65,7 +65,7 @@ export function AlbumModal({
         style={{
           background: "oklch(96% 0.012 var(--hue))",
           borderRadius: phone ? "26px 26px 0 0" : 26,
-          padding: phone ? "20px 16px calc(20px + env(safe-area-inset-bottom))" : 26,
+          padding: phone ? "20px 16px calc(20px + var(--safe-bottom))" : 26,
           width: phone ? "100%" : 640,
           maxWidth: "100%",
           maxHeight: "100%",

web/src/components/AppHeader.tsx

@@ -27,8 +27,8 @@ export function AppHeader({
           display: "flex",
           justifyContent: "center",
           padding: status
-            ? `calc(${compact ? 8 : 10}px + env(safe-area-inset-top)) 16px 0`
-            : "env(safe-area-inset-top) 0 0",
+            ? `calc(${compact ? 8 : 10}px + var(--safe-top)) 16px 0`
+            : "var(--safe-top) 0 0",
           flex: "none",
         }}
       >
@@ -47,8 +47,8 @@ export function AppHeader({
         gap: compact ? 10 : 16,
         // The status bar is translucent in standalone mode, so make room for it.
         padding: compact
-          ? "calc(12px + env(safe-area-inset-top)) 16px 4px"
-          : "calc(18px + env(safe-area-inset-top)) 32px 6px",
+          ? "calc(12px + var(--safe-top)) 16px 4px"
+          : "calc(18px + var(--safe-top)) 32px 6px",
         flex: "none",
         position: "relative",
       }}

web/src/components/ParentPanel.tsx

@@ -143,7 +143,7 @@ export function ParentPage({ clock, onOpenPerf }: { clock: ClockState | null; on
       <div className="m-scroll" style={{ padding: "0 var(--m-gutter) calc(var(--m-dock-clearance) + 24px)" }}>
         <div
           style={{
-            padding: "calc(16px + env(safe-area-inset-top)) 0 16px",
+            padding: "calc(16px + var(--safe-top)) 0 16px",
             fontSize: 24,
             fontWeight: 900,
             color: "var(--paper)",

web/src/components/PlayView.tsx

@@ -240,8 +240,8 @@ export function PlayView({
             title="Einer Fernbedienungs-Taste zuweisen (oder: A und dann eine Zahl, Shift+A für nur dieses Lied)"
             style={{
               position: "absolute",
-              bottom: 28,
-              right: 32,
+              bottom: "calc(28px + var(--safe-bottom))",
+              right: "calc(32px + var(--safe-right))",
               border: "none",
               cursor: "pointer",
               width: 52,

web/src/components/PlayerBar.tsx

@@ -50,7 +50,7 @@ export function PlayerBar({
         backdropFilter: SHOW_GLASS_BLUR ? "blur(6px)" : undefined,
         padding: "16px clamp(12px, 3vw, 32px)",
         // Clear of the iPhone home indicator when installed to the home screen.
-        paddingBottom: "calc(16px + env(safe-area-inset-bottom))",
+        paddingBottom: "calc(16px + var(--safe-bottom))",
         display: "flex",
         alignItems: "center",
         justifyContent: "center",

web/src/components/TabRail.tsx

@@ -27,7 +27,7 @@ export function TabRail({ page, onSelect, showRoom }: Props) {
       style={{
         position: "absolute",
         top: "50%",
-        right: 16,
+        right: "calc(16px + var(--safe-right))",
         transform: "translateY(-50%)",
         zIndex: 3,
         display: "flex",

web/src/components/tippen/AppHeader.tsx

@@ -22,7 +22,7 @@ export function AppHeader({ title = SKIN.tippenName, status, compact = false, on
         alignItems: "center",
         justifyContent: "center",
         gap: 16,
-        padding: compact ? "12px 28px 4px" : "calc(18px + env(safe-area-inset-top)) 32px 6px",
+        padding: compact ? "12px 28px 4px" : "calc(18px + var(--safe-top)) 32px 6px",
         flex: "none",
         position: "relative",
       }}

web/src/hooks/useKeyboardInset.ts

@@ -6,8 +6,6 @@
 
 import { useEffect, useState } from "react";
 
-import { fullHeight } from "../lib/fullHeight";
-
 export function useKeyboardInset(): number {
   const [inset, setInset] = useState(0);
 
@@ -15,9 +13,7 @@ export function useKeyboardInset(): number {
     const viewport = window.visualViewport;
     if (!viewport) return;
     const measure = () =>
-      // Measured against the height the stage actually has (see lib/fullHeight.ts), not
-      // `innerHeight`, which can be a status bar short in the home-screen app.
-      setInset(Math.max(0, Math.round(fullHeight() - viewport.height - viewport.offsetTop)));
+      setInset(Math.max(0, Math.round(window.innerHeight - viewport.height - viewport.offsetTop)));
     viewport.addEventListener("resize", measure);
     viewport.addEventListener("scroll", measure);
     return () => {

web/src/lib/fullHeight.ts

@@ -1,41 +0,0 @@
-/** The height the phone layout should fill, in CSS px - and, in the iOS home-screen app,
- * a `--full-height` variable on `<html>` that mobile.css sizes the stage with.
- *
- * In the home-screen app (`navigator.standalone`, iOS only) the page runs edge to edge
- * under a translucent status bar, so it should be exactly as tall as the screen. iOS does
- * not always agree: the layout viewport - and with it `100dvh`, `innerHeight` and a
- * `position: fixed; inset: 0` box - can come back one status bar short, which left the
- * dock floating that far above the bottom of the screen with an empty strip below it.
- * `screen` does not have that problem, and in standalone mode there is no browser chrome
- * for it to overcount. iOS reports `screen` in portrait whatever the orientation, hence
- * the swap.
- *
- * Everywhere else (a Safari tab, Android, the kiosk) this is just `innerHeight` and
- * neither the variable nor `data-standalone` is set. */
-
-const standalone =
-  typeof navigator !== "undefined" &&
-  (navigator as Navigator & { standalone?: boolean }).standalone === true;
-
-export function fullHeight(): number {
-  if (!standalone) return window.innerHeight;
-  const landscape = window.innerWidth > window.innerHeight;
-  const screenHeight = landscape
-    ? Math.min(screen.width, screen.height)
-    : Math.max(screen.width, screen.height);
-  return Math.max(window.innerHeight, screenHeight);
-}
-
-export function installFullHeight(): void {
-  if (!standalone) return;
-  const root = document.documentElement;
-  root.dataset.standalone = "";
-  const apply = () => root.style.setProperty("--full-height", `${fullHeight()}px`);
-  apply();
-  window.addEventListener("resize", apply);
-  window.addEventListener("orientationchange", apply);
-  // Coming back from the background (or a relaunch restoring the page) is when iOS is
-  // most likely to hand back a short viewport, and it does not always fire `resize`.
-  window.addEventListener("pageshow", apply);
-  document.addEventListener("visibilitychange", apply);
-}

web/src/main.tsx

@@ -3,7 +3,6 @@ import { createRoot } from "react-dom/client";
 
 import { App } from "./App";
 import { PERF } from "./lib/perfSettings";
-import { installFullHeight } from "./lib/fullHeight";
 import { applySkin } from "./lib/skins";
 import "./styles/app.css";
 import "./styles/mobile.css";
@@ -13,7 +12,6 @@ import "./styles/clock.css";
 
 // Before the first render, so nothing ever paints in the wrong skin's colours.
 applySkin();
-installFullHeight();
 
 createRoot(document.getElementById("root")!).render(
   <StrictMode>

web/src/styles/app.css

@@ -8,6 +8,14 @@
   --accent-dim: oklch(78% 0.14 var(--accent-hue));
   --sea-deep: oklch(20% 0.045 var(--hue));
   --shadow: oklch(15% 0.05 var(--hue) / 0.35);
+
+  /* The device's unsafe edges: home indicator, rounded corners, a notch in landscape.
+     Anything positioned against a screen edge adds the matching one to its offset or
+     padding - see "Layout on phones" in README.md. */
+  --safe-top: env(safe-area-inset-top, 0px);
+  --safe-right: env(safe-area-inset-right, 0px);
+  --safe-bottom: env(safe-area-inset-bottom, 0px);
+  --safe-left: env(safe-area-inset-left, 0px);
 }
 
 * {

web/src/styles/clock.css

@@ -38,7 +38,7 @@
 
 .clock-badge {
   position: absolute;
-  top: calc(18px + env(safe-area-inset-top));
+  top: calc(18px + var(--safe-top));
   left: 50%;
   transform: translateX(-50%);
   padding: 1.2vmin 3vmin;

web/src/styles/mobile.css

@@ -8,41 +8,25 @@
   --m-glass-fill: oklch(32% 0.04 var(--hue) / 0.42);
   --m-glass-rim: oklch(100% 0 0 / 0.22);
   --m-glass-shadow: 0 10px 30px oklch(10% 0.04 var(--hue) / 0.45);
-  --m-gutter: 16px;
+  /* Symmetric, and wide enough to clear a landscape notch on either side. */
+  --m-gutter: max(16px, var(--safe-left), var(--safe-right));
   /* Height of the floating dock, so scrolling content can clear it. */
-  --m-dock-clearance: calc(96px + env(safe-area-inset-bottom));
+  --m-dock-clearance: calc(96px + var(--safe-bottom));
 }
 
-/* iOS 26 can leave the layout viewport of a home-screen app one status bar short -
-   `100dvh`, `innerHeight` and `position: fixed; inset: 0` all come back short, and
-   WebKit draws nothing below the document - so the dock floated that far above the
-   bottom over a dark strip. Sizing the stage alone was not enough: it got clipped at
-   the short viewport. The document itself has to reach the bottom of the screen, so in
-   standalone mode (`data-standalone` and `--full-height`, set by lib/fullHeight.ts)
-   `<html>` takes the larger of `100vh` and the screen's height, and the stage follows.
-   Everywhere else the stage just pins to the viewport. The sea colour underneath
-   covers whatever might still peek through. */
+/* The stage pinned to the viewport rather than sized by `100dvh`, and the sea colour
+   behind it, so nothing white can ever show around the edges. */
 html,
 body {
   background: var(--stage-deep, #001b21);
 }
 
-:root[data-standalone] {
-  height: max(100vh, var(--full-height, 0px));
-  overflow: hidden;
-}
-
 .stage[data-phone] {
   position: fixed;
   inset: 0;
   height: auto;
 }
 
-:root[data-standalone] .stage[data-phone] {
-  bottom: auto;
-  height: max(100vh, var(--full-height, 0px));
-}
-
 .m-glass {
   background: var(--m-glass-fill);
   backdrop-filter: blur(14px) saturate(1.7);
@@ -107,7 +91,7 @@ body {
   position: sticky;
   top: 0;
   z-index: 2;
-  padding: calc(10px + env(safe-area-inset-top)) var(--m-gutter) 14px;
+  padding: calc(10px + var(--safe-top)) var(--m-gutter) 14px;
 }
 
 .m-sticky::before {
@@ -127,7 +111,7 @@ body {
   display: flex;
   align-items: center;
   gap: 10px;
-  padding-top: calc(12px + env(safe-area-inset-top));
+  padding-top: calc(12px + var(--safe-top));
 }
 
 .m-navbar-title {
@@ -349,7 +333,7 @@ body {
   display: flex;
   flex-direction: column;
   gap: 10px;
-  padding: 0 12px calc(10px + env(safe-area-inset-bottom));
+  padding: 0 max(12px, var(--safe-right)) calc(10px + var(--safe-bottom)) max(12px, var(--safe-left));
   pointer-events: none;
   transition: bottom 0.2s ease;
 }
@@ -590,3 +574,35 @@ body {
   transform-origin: left;
   transition: transform 0.5s linear;
 }
+
+/* A phone on its side: stacked, the mini player and the tab row took half the screen.
+   Side by side they take one row, and the scroll padding shrinks to match. */
+@media (max-height: 500px) {
+  :root {
+    --m-dock-clearance: calc(28px + var(--safe-bottom));
+  }
+
+  .m-dock {
+    flex-direction: row;
+    align-items: center;
+  }
+
+  .m-dock > .m-mini {
+    flex: 1;
+    min-width: 0;
+  }
+
+  .m-dock-row {
+    flex: none;
+  }
+
+  /* Alone (search open, or nothing playing) the row takes the full width again. */
+  .m-dock-row:only-child {
+    flex: 1;
+  }
+
+  .m-dock-row:not(:only-child) .m-tabs {
+    flex: none;
+    width: 220px;
+  }
+}